Deoxygenation for Carbon Capture

Direct air capture (DAC) processes rely on extracting CO₂ from air using a liquid solvent or solid sorbent media.

For media-based DAC, CO₂ gets selectively adsorbed on the surface or in the pores. There could be trace amounts of Nitrogen and oxygen as the adsorbed species. While regenerating the same at high temperatures, the species get desorbed from the media, forming a gas mixture rich in CO₂ but containing impurities like oxygen, nitrogen, water, etc.

BCCK’s DeOxo systems are designed to remove oxygen from CO₂ gas via hydrogen or natural gas injection as the fuel source. Oxygen reacts with either of these gases to form by-products like CO₂ and water (fuel dependent). The injection rates allow oxygen removal down to 5 ppmv to be easily achieved.

The availability of fuel sources is location—and project-driven. Typically, injecting Hydrogen could reduce the CAPEX and energy requirements of the deoxygenation process owing to its low reaction temperatures compared to methane.